Pump



Sept. 3, 1929. .K. D; SMITH 1,726,633

K. D. SMITH Sept. 3, 1929.

PUMP

Filed Dec. 20, 1926 3 Sheets-Sheet 2 [N V ENTOR Mar! 0. 5/mth Sept. 3,1929. K. D. SMITH 1,726,633

PUMP

Filed'Dec. 20., 1926 3 Sheets-Sheet s IL/VVENTOR v Karl D. /nZf/l ATTO/ENE VS Patented Sept. 3, 1929.

UNITED STATES PATENT OFFICE.

KARL D. SMITH, OF BATTLE CREEK, MICHIGAN, ASSIGNOR T0 UNION STEAM PUMPCOMPANY, OF BATTLE CREEK, MICHIGAN.

PUMP.

Application filed December 20, 1926. Serial No. 155,932.

The main objects of this invention are:

First, to provide an improved high pres sure pump assembled as a unitwhlch 1s very compact and one in. which the most of the moving parts arehoused or inclosed and eflectively protected and lubricated.

Second, to provide an improved pump which is Well adapted for use increamerles and the like where freedom from dirt and grease is highlydesirable.

Third, to provide an improved pressure pump embodying these advantageswhich is comparatively economical and at the same time durable.

Objects pertaining to details and economies of construction andoperation of my 1nvention will definitely appear from the detaileddescription to follow. The invention is clearly defined and pointed outin the claims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawing forming a part of thisapplication, in which:

Fig. 1 is a side elevation of a structure embodying the features of myinvention as especially designed by me in an apparatus for treating milkknown as a viscolizer.

Fig. 2 is a fragmentary view partially in vertical longitudinal sectionon a line corresponding to line 2-2 of Fig. 3.

Fig. 3 is a fragmentary view partially in horizontal section on a linecorresponding to line 33 of Figs. 2 and 4.

Fig. 4 is a fragmentary perspective view showing the arrangement of theauxiliary housing for the driving connections.

Fig. 5 is a perspective view of the eccentrics and of the driven gearconnected thereto.

Fig. 6 is a fragmentary perspective view with the cap or top portion ofthe housing removed, further illustrating the relation of the parts.

Referring to the drawings, in the embodiment illustrated, I provide abase 1 having a chamber or housing 2 therein for certain of themechanisms as will be hereinafter described, this housing having aremovable top or cap 3.

The structure illustrated is especially designed by me for a milktreating apparatus, known commercially as a viscolizer, this unit beingdesignated generally by the numeral 4. As the details of this unit formno part of my present invention, I do not fully illustrate nor describethe same herein.

This unit includes pumps having plunger rods 5 which are arrangedthrough stuffing boxes 6 carried by a closure plate 7 for the opening 8at the end of the housing. The mounting of the stuffing box upon theplate 7 instead of Within the wall housing is a matter of manufacturingconvenience and also facilitates the assembling and disassembling of theparts.

The housing 2 is adapted as a lubricant receptacle, it having a curvedbottom 2 (see Fig. 2), the purpose of which will appear as thedescription proceeds.

The end walls of the housing are provided with bearing-like bosses 9 and10 in which the non-rotating shaft 11 is supported, the shaft being heldagainst rotation by the set screw 12. These bosses are open at theirends to permit the introduction and removal of the shaft, the openingsbeing closed by the plates 13.

The end walls of the housing are also provided with bearings notdetailed for the driving shaft 14, the outer endof one of the bearingsbeing closed by the plate 15, the shaft projecting through the otherbearing to receive the sprocket wheel 16. This sprocket wheel isconnected to the motor indicated generally by the numeral 17 mounted onthe bracket 18 on the housing. An auxiliary housing 19 is provided forthe driving connections of the motor to the shaft 14.

.On the shaft 11, I mount a plurality of eccentrics 20, these eccentricsbeing, in the embodiment illustrated, formed integrally and lying sideby side without space between them and being suitably indexed relativeto each other.

The gear 21 is, in the embodiment illustrated, also formed integrallywith the eccentrics. The several connected eccentrics, in effect,constitute an eccentric shaft, and for brevity, I have herein designatedthe same by the broad term cam shaft. The gear 21 meshes with a pinion22 on the shaft 14 so' that the gear 21 and eccentrics are driven as aunit or single cam shaft.

The pitmen or eccentric rods 23 are provided with suitable straps 30embracing the eccentrics, these straps lying side b side and in slidingbearing engagement. ne of the outer straps is supported by a shoulder 31at the inner side of the gear 21 and the other by a flange-like collar32, the collar being also formed integrally with the eccentries.

The pitmen or eccentric rods 23 are connected to the slides or crossheads 25 by the pins 24. These cross heads are arranged side by side incoacting sliding contact upon the slideway 26, constituting a portion ofthe bottom of the housing, this part being suitably elevated above thelubricant well portion 2 of the housing bottom. The slide 26 has a flatface which is, asv illustrated, common to all of the cross heads.

Parallel slideway end members 27 project upwardly from the slideway andconstitute side members or supports for the outer cross heads. Theslideway top member 28 has a flat inner face common to all of the crossheads and is bolted upon the end members 27. This top has an upwardlyprojecting wall 33 at its rear edge and ends, a portion of its forwardedge, at 34, lying close to the periphery of the gear 21 so that aconsiderable portion of the lubricant picked up by the gear isdischarged upon the slideway top member, the gear acting as a pumpproviding a constant supply of lubricant when the machine is running.

To. make this gearv efficient as a pump, the housing is suitablyconformed to the gear, as shown in Fig. 2, that is, the periphery of thegear throughout its greater portion is quite close to the wall orhousing.

The bottom of the slideway projects slightly beyond the forward edge ofthe slideway top so that the lubricant discharged upon the slideway willflow off the front edge of. the top upon the bottom.

To further distribute the lubricant to the cross heads, the top isprovided with an opening 29 above the path of each cross head. Theresult is that a large amount of lubricant is continuously supplied tothe cross head. The eccentrics are also kept thoroughly lubricated, theeccentrics dipping into the lubricant on the down-stroke, the lubricantbeing carried up and delivered between the coacting faces of theeccentric straps, and also the lubricant flows down the connecting rods23 when the same are forwardly inclined to carry lubricant to the pins24, and when rearwardly inclined, as on the down-stroke of theeccentrics, the lubricant is directed to the eccentrics. Thus all oftheparts are very efficiently lubricated, the structure is very compact andthe number of parts is minimized.

Further, the moving parts are so encased that the escape of lubricant iseffectively prevented, thus well adapting my improvements for such usesas in the viscolizer which is used, as stated, in the treatment of milkwhere cleanliness is greatly to be desired. H

A further advantage is that the parts are economical to produce and veryeasily assembled, and the structure is well adapted for high pressurepumps.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. In a structure of the class described, the combination of a mainhousing adapted as a lubricant receptacle, a driving shaft disposed toproject from said housing at one end and provided with a driving pinionwithin the housing, a driven gear meshing with said pinion, a pluralityof eccentrics connected to said driven gear, a spindle on which saiddriven gear and eccentrics are rotatably mounted, a pitmen coacting withsaid eccentrics, a cross head way base member integral with said housingand constituting a portion of the bottom wall thereof, cross headsdisposed on said way base member side by side in sliding coactingrelation, way side members on said base coacting with the outer sides ofthe outer cross heads, a way top member removably mounted on said wayside members and disposed with its front edge adjacent to said gear sothat the gear constitutes a pump. discharging the lubricant upon saidway top member, said way top member being provided with openings for thepassage of lubricant therethrough to said cross heads, a plurality ofpiston rods projecting through said main housing and connected to saidcross heads, a motor mounted on said main housing, driving connectionsfor said motor to said driving shaft disposed at the side of the mainhousing, and an auxiliary housing for said driving connections and theprojecting end of said driving shaft.

2. In a structure of the class described, the combination of a mainhousing adapted as a lubricant receptacle, a driving shaft dis- .posedto project from said housing at one end and provided with a drivingpinion within the housing, a driven gear meshing with said pinion, aplurality of eccentrics connected to saiddriven gear, a spindle on whichsaid driven gear and eccentrics are rotatably mounted, pitmen coactingwith said eccentrics, a cross head way base member integral with saidhousing and constituting a portion of the bottom wall thereof, crossheads disposed on said way base member side by side in sliding coactingrelation, way side members on said base coacting with the outer sides ofthe outer cross heads, a way top member removably mounted on said wayside members and disposed with its front edge adjacent to said gear sothat the gear constitutes a pump discharging the lubricant upon said waytop member, said top member being provided with openings for the passageof lubricant therethrcugh so said cross heads, and a pluralityof pistonrods projecting through said main housing and connected to sa1d crossheads.

3. In a structure of the class described, the

rotatably mounted, pitmen coacting with said eccentrics, a cross headway base member integral with said housing and constituting a portion ofthe bottom wall thereof, cross heads disposed on said base member sideby side in sliding coacting relation, way side members on said basecoasting with the outer sides of the outer cross heat s, a plu rality ofpiston rods projecting through said main housing and connected to saidcross heads, a motor mounted on said main housing, driving connectionsfor said motor to said driving shaft disposed at the side of the mainhousing, and an auxiliary housing for said driving connections and theprojecting end of said driving shaft.

4t. In a structure of the class described, the combination of a housing,a spindle within said housing, a plurality of integrally formedeccentrics disposed side by side in non-spaced relation rotatablymounted on said spindle, a gear formed integrally with said eccentrics,a plurality of cross heads disposed side by side in sliding coastingrelation, a plurality of pitmen provided with eccentric straps coactingwith said e'ccen trics, said straps being disposed lIl side by.

side bearing relation, a slideway for said cross heads comprising a basemember having a flat face common to all of the said cross heads, and wayside members coasting with the outer sides of the outer cross heads anda way top mounted on said way side members disposed with its front edgein a plane at the rear of the front edge of said way base member, saidtop member being disposed with a portion of its edge in close proximityto said gear so that the gear constitutes a pump discharging lubricantupon said top, said top being provided with openings above the path ofsaid cross heads, said housing constituting a lubricant receptacle andbeing conformed to said gear.

5. In a structure of the class described, the combination of a housing,a spindle within said housing, a plurality of integrally formedeccentrics disposed side by side in non-spaced relation rotatablymounted on? said spindle, a gear formed in tegrally with saideccentrics, a plurality of cross heads disposed side by side in slidingcoasting relation, a plurality of pitmen provided with eccentric strapscoacting with said eccentrics, said straps being disposed in side byside bearing relation, a slideway for said cross heads comprising a basemember having a flat face common to all of the said cross heads, and wayside members coacting with the outer sides of the outer cross heads, anda way top mounted on said way side members disposed with its front edgein a plane at the rear of the front edge of said way base member, saidtop member being disposed with a portion of'its edge in close proximityto said gear so that the gear constitutes a pump discharging lubricantupon said top, said housing constituting a lubricant receptacle andbeing conformed to said gear.

6. In a structure of the class described, the combination of a housingadapted as a lubricant receptacle, a gear, a plurality of eccentricsdisposed side by side in nonspaced relation rotatable with said gear, aplurality of cross heads disposed side by side in coacting slidingrelation, a plurality of connecting rods provided with eccentric strapscoacting with said eccentrics, said straps being disposed in side byside bearing relation, a slideway for said cross heads comprising a basemember having a fiat face.

common to all of the said cross heads, way side members coacting withthe outer sides of the outer cross heads, and a way top mounted on saidway side members disposed with its front edge in a plane at the rear ofthe front edge of said way base member, said top member being disposedwith a portion of its edge in close proximity to said gear so that thegear constitutes a pump discharging lubricant upon said top.

7. In a structure of the class described, the combination of a housingadapted as a lubricant receptacle, a plurality of eccentrics disposedside by side in non-spaced relation, a plurality of cross heads disposedside by side in coacting sliding relation, a plurality of connectingrods provided with eccentric straps coacting with said eccentrics, saidstraps being disposed in side by side bearing relation, a slideway forsaid cross heads comprising a base member having a fiat face common toall of the said cross heads, way side members coacting with the outersides of the outer cross heads, and a way top mounted on said way sidemembers disposed with its front edge in a plane at the rear of the frontedge of said way base member, and a means for delivering lubricant tosaid way top member.

8. In a structure of the class described, the combination of a housingadapted as a lubricant receptacle, a gear, a plurality of eccentricsdisposed side by side rotatable with said gear, a plurality of crossheads disposed side by side in coacting bearing relation, a plurality ofconnecting rods provided with eccentric straps ooacting with saideccentrics, said straps being disposed in vside by side bearingrelation, and a slideway common to all of said cross heads and providedwith a top disposed in close proximity to said gear so that the geareonstitutes a pump discharging lubricant upon said top, the topconstituting a distributing means for the lubricant to said cross heads.

9. In a structure of the class described, the combination of a housingadapted as a lubricant receptacle, a crank shaft provided with a gear,coacting connecting rods, connecting rod cross heads disposed sidebyside in sliding coacting relation, a slideway for said cross headscomprising a base member having a flat face common to all of the saidcross heads, and way side members coacting with the outer sides of theouter cross heads, and a Way top mounted on said Way side membersdisposed with its front edge in a plane at the rear of the front edge ofsaid way base member to discharge lubricant thereon and upon saidconnecting rods, said top member being disposed with a portion of itsedge in close proximity to said gear so that the gear constitutes a pumpdischarging lubricant upon said top, said top being provided withopenings above the path of said cross heads.

In witness whereof I have hereunto set my hand.

KARL D. SMITH.

